hippy interior

Thats what I would do. Still run the sub Bridged, much better sound especially on a single sub.

Running the 2 in series as I explained pretty much turns 2 subs into a single with a higher omb to make it easier to run on the amp.

some newer amps allow you to run a bridge and regular at same time, so it is possible you could bridge your sub and connect the others to the amp also, however, I dont think you need that much power to those other speakers unless you really want to blow yourself out of the van. Lol.

The deck should have a power rating, if it is like 15 watt front channel and 25-35 rear, that is more than enough for 6 1/2" or 5 1/4" or below. If they are 6" x 9" I might consider getting a second smaller amp or equalizer to give it a bit of extra power.

This is all based on opinion and installing stereos in my cars and friend's cars for 20+ years and I am not a pro but as least you get a non bias opinion on it.

The book for the amp should explain bridging. If not, just look for the bridge terminals usually indicated by parentheses. You then just run positive on the sub to the positive bridge terminal and negative on sub to negative bridge terminal.

You will notice a huge difference, especially with a single sub. If a song is recorded with bass in 2 channels, and you only wire the sub to one channel you will only get half the notes or very muted. Running it bridged will put the sub/amp in Mono which will draw from both channels. Just FYI...

ok now i understand when you say bridge you mean the conectors on the side of the amp, the manual shows wireing a sub and two speakers to the amp, i'll only wire the sub to the amp and the 4 speakers to the deck, and it should sound ok?

Yep it should sound good. I would make sure to turn the pre-amp on in the deck. Sometimes it is a "Loud" button or other indication of more power to the speakers.

Also, many decks have an option to change the RCA output to a "sub mode" which will do the same thing as a Cap on the subs, it filters the high end notes out of the signal going to the amp. This helps alot and improves sound quality big time. Some decks have RCA outputs that are specifically labeled "Sub" so make sure to check the back of the deck to see how many sets of outputs it has or the deck menu options if you can put that output into subwoofer mode.

got it all wired up, sounds great plenty of base, just have to get my curtains up and find a matress that fits,wait till spring and do some cruising thanks to all the help i got from you guys on here !!

i bought a 8'' memory foam mattress and cut to fit,put on my matching bed spread, now when spring gets here i can test drive the disc brake conversion and if i break down i'll have a place to sleep, and if my wife kicks me out, lol